Trolley.



UNITED strarEs airENr oEEtoE.

CHA RLES BA I( ER, ()l PHILA DELPHIA PENNSYLVA NTA.

TROLLEY.

- new and useful Improvements in 'l`rolle'vs, of

which the following` is. a specification.

My invention relates to unprotiements 1n trolleys, andv more particularl)Y to an im proved mounting for the trolle \Y harp on the trolle)v pole` the. object of the invention being' to so mount the harp with relation to the ypole that the' harp will be elastieally support- .ed, and capable of predetermined rotarv mot-ion, toipermit the wheelto follow the irregularities in the'trolleywire, and .fo com struct .and assemble the other parts, that this mou'ntingot the harp will been eX- tremelyv sensitive one, and preventa great deal of annoyance caused ln' the wheels jumpinglr from the wire as is the case with ,the ordinary cons-:tructxon of trolleyY in use'.

A further object to providean improved elastic mounting of the trollenharp, which 1s .capable'of adjustment to regulate the pres.-

sure of the-wl'ieel against the-trolley` wire, and wlnelris so. constructed that. while the .wheel 1s allowed a certamlateral movement,

- it Will be automatically centered toa position in alinement with the. trollo)v pole should the wheel escape tromthe wire, and thus render the. replacingr of the wheel upon the wire. an easy matter. y

A further object is to provide improvements of' this character ot' extremely simple incxpcnsi're eonstruction, and so construct "and support thevparts upon which. the greatest wear will come, that such parts can he replacedwhen Worn, and not require the substitution 'of anentirely new device.

lith these. and other objects in View the. invention consists incertain novel features of construction, combinations and arrangements-of parts as will he more l'ulljf herein after described and pointed out in the claims.

vl'n the'aecompanying drawings Figure 1, is a view in side.v elevation illustra'tiiuhr nl v improvements in operative. position'. Fig. 2, is a View in longitudinal section through the vertical tube 2, and Fig. 3, is a view in section on line :c-:c of Fig.. 1. j

1- `represents-a trolley pole. and 2 a sleeve or' tube, located at an acute angle with relation to pole Land 4connected to said pole.y by a tubular extension '3. This tube 2 and its eX- tension 3 may loe made in agreat many ways.

speciacatiun of Letters Patent. Application filed October 15, 1908.` Serial No. 457,769.

Patented May 18, 1909.

tnbinggalthough I do not limit n1 \'sell lo the particular construction of this tul're or l'ranie.V

rThe tube 2 when in operative position is sulstantiall) Vertical, and is adapted to receive One construction being an ordinary hic \'ele` therein the extended plunger portion 4 olI the j harp 5, which lat-ter carries the ordinarx' trolley wheel 6 in engagement with wire 7. The. plunger: is reduced in diameterthroughout the greater portion ot' its length forming' a shoulder S, as elearl)v shown in Fig'. L. and a.

coiled spring' 9 is disposed around the plunger 4 and hears at its upper end against.shoulder 8, to exert upwr rd pressure on the harp and trolley wheel. 'l`he lewe/i' endof the tube f2 is closed hy a ring: or nut/1() screwed opening through Awhich the plunger 4/p'rojects. l collar 1l istloeated inthe-lower end' of tube 2 and against the nut or 4ring 10, and.

the lower end ot"thesjnfingfliea-rs against this collar 11, and it will he observed. that hy adjustingthe nut or rinry 10, or hy the insertion of a larger or smallereollar 11 in the end ofthe tube 2, the'. tension o'f'the spring can he adjusted to suit all conditions. A longitudiv nal slot 12 is provided in the upper portion ol' tuhev 2, and a screw 13 is screwed into the larger upper portion ofthe harp plunger, and carries a sleeve. '14 thereon, which latter is capable ot' rotaryr m'otion on the screw; and

adapted, when the screw is moved into con-l tact with the walls ofthe slot, to reduce l'rietion and consequent Wear.

A wearing ringy 15 is internally screw threaded, and screwed upon the upper end ol tuh 2. This ring preferablyT4 overlaps a porvtion of the. slot 12 and is made with a curved notch vor recess 16 in its lower edge, the 'alls ot said noteh or recess merginginto the walls of the slot 12, so that when the, trolley` wheel escapes from the wire', the upward pressure of the spring` 9 on the. harp, will force the screw 13 into the notch 16 in ring 15. and thus center the screw in said curved notch so that the wheel (i will be held in alinement vwith the trolley pole. and can be readilj.v returnedv to the trolley wire. Thus by oon- Vstructure; the ring' 15 withthe notoh 16, thel greatest Wear will come upon this ring and it on to the" lower end o`t'the tuheand havinefa central" lll() can be readily replaeed'with. but slight expense when unduly. worn.

l*` ig..1 represents the normal position ot' the parts in operation. It Vwill be seen that when in such ot the harp will hey moved down into the. tube position, the plunger portion' perform all the dii-ties of holding the wheel.

2, against the screw 13 will be located about ends of the slot 12. .When in sucliposition the trolley wheel will be permitted a certain amount of lateral movement, vor rather the harp will be permitted a. certain amount of rotary movement with relation to t-he trolley pole, to com )ensate for irregularities in the wire 7, but t e principal advantage attained is that the wheel 6 will be' elastically held againstlthe wi're and the connection be an extremely sensitive one, quick to conform to the irregularities of the wire and to prevent the wheel jumping from the wire. A great deal of annoyance, as .is well known.' is caused bythe wheelsA jumping from the wire, which is due in a large part, to the tact that springs which hold the .wheel against the Wire are located/on top of the car and a eoiisider'able distance from the wheel, hence any sudden irregularity, or a too great speed on the part of the car will cause the wheel to jump from the vwire as the elasticvconnection ofthe pole is so far away, and the connection of the wheel and wire is not sulliciently sensitive to compensate for anything out of the ordinary slow operation. j v With my iinprovement,wliile I ydo not intend to dispense with the springs for supporting the trolley pole, I am enabled to einploy springs of much lighter tension than creto ore required. Such powerful springs will not be necessary, as the connection at the wire will be so sensitive that the main springs on the ear will not be called upon to in contact withthe wire.

A great many changes` might be made in the general form and arrangement of'parts described without departing froinmyinvention, and hence I do not restrict myself to the precise details set' forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

pressure of spring 9, so that the Having thus described my invention what midway the l I claim as new and desire to secure by Letters Patent is:

1. ln a device of the character described, the combination with a trolley pole, a tube secured at an angle to the free end of said pole and. having an elongated slot therein, a harp, a trolley wheel carried by the harp, an elongated plunger on said harp located in the said tube, a ring or nut screwed on the lower end of thetube, a collar inside the. tube and around the plunger, a spring around A the plunger bearing at its upper end against the plui'iger, and at its lower end against the collar, a screw in saidplunger located in the slotted portion ot' the tube, a wearing ring secured on the upper end of the tube and having a curved notch in its lower edge i registering with thc` side walls o'f the slot. in

said tube to center the screw, when the plunger-is moved upward by the spring. c

2. In a device of the character described, the combination with a trolley pole, a tube secured at an angle to the free endof said pole and having an elongated slot therein, a harp, a trolley wheel carried by said harp, an elongated plunger on said harp extendinfr through the said-tube, a device fixed onsaid plunger located in the slot and vlimitingthe rotary movement of the harp, an anni'ilar f shoulder on said plunger in the tube, 'said tube screw threaded at its lower end, an ad.

justing nut or ring screwed on to the lower end of saidltube, and located around the plunger, and a coiled spring around said.,- plunger in the tube and between the annular shoulder on the plungiraifl said ring oi nut.

ln testimony whereof I have signed my naine to this specilication in thesprcsence ot two subscribing witnesses. v CHARLES BAKER, Witnesscsz l 'i R. H. KRENKEM J. A. L. MULi-IALL. 

